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Tags: American Foundation for the Blind, Audak Company, Bell and Taintor, Bell Telephone Laboratories Inc, Byers Recording Studios, constant linear velocity, E R Harris, Electrical Research Products Inc, J Robert Atkinson, phonograph disc, RCA Victor Company Inc, Readophone, revolutions per minute, Talking Books for the Blind
Tags: 12 inch record, Advisory Commitee, American Foundation for the Blind, C M Sinnett, Constant Linear Velocity Principle, Constant Turntable Sound, Detroit Michigan, E R Harris, F B Walker, J G Byers, M C Batsel, Maximilian Weil, R T Friebus, Readophone, Talking Books for the Blind, Talking Machines, Wayne County Library for the Blind, Wayne County Michigan
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